package com.example.controller;

import com.example.model.Notification;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.validation.Valid;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/api/notifications")
@Tag(name = "通知管理", description = "系统通知的创建、发送和管理")
public class NotificationController {

    // ==================== 用户端通知接口 ====================
    @GetMapping("/user")
    @Operation(summary = "获取用户通知列表")
    public ResponseEntity<Page<Map<String, Object>>> getUserNotifications(
            @RequestParam(defaultValue = "0") int page,
            @RequestParam(defaultValue = "10") int size,
            @RequestParam(required = false) Boolean unreadOnly) {
        
        // 这里应该根据当前用户ID获取通知
        Pageable pageable = PageRequest.of(page, size, Sort.by("createdAt").descending());
        
        // 模拟通知数据
        List<Map<String, Object>> notifications = List.of(
            Map.of(
                "id", 1L,
                "title", "订单状态更新",
                "content", "您的订单 #LO20241201001 已完成处理",
                "type", "ORDER",
                "level", "INFO",
                "isRead", false,
                "createdAt", LocalDateTime.now().minusHours(2),
                "actionUrl", "/orders/1"
            ),
            Map.of(
                "id", 2L,
                "title", "优惠券即将过期",
                "content", "您有一张优惠券将在3天后过期，请及时使用",
                "type", "PROMOTION",
                "level", "WARNING",
                "isRead", true,
                "createdAt", LocalDateTime.now().minusDays(1),
                "actionUrl", "/coupons"
            )
        );
        
        Page<Map<String, Object>> notificationPage = Page.empty(pageable);
        return ResponseEntity.ok(notificationPage);
    }

    @GetMapping("/user/unread-count")
    @Operation(summary = "获取用户未读通知数量")
    public ResponseEntity<Map<String, Object>> getUnreadNotificationCount() {
        Map<String, Object> response = new HashMap<>();
        response.put("unreadCount", 3);
        return ResponseEntity.ok(response);
    }

    @PutMapping("/user/{id}/read")
    @Operation(summary = "标记通知为已读")
    public ResponseEntity<Map<String, Object>> markNotificationAsRead(@PathVariable Long id) {
        Map<String, Object> response = new HashMap<>();
        response.put("success", true);
        response.put("message", "通知已标记为已读");
        return ResponseEntity.ok(response);
    }

    @PutMapping("/user/read-all")
    @Operation(summary = "标记所有通知为已读")
    public ResponseEntity<Map<String, Object>> markAllNotificationsAsRead() {
        Map<String, Object> response = new HashMap<>();
        response.put("success", true);
        response.put("message", "所有通知已标记为已读");
        return ResponseEntity.ok(response);
    }

    @DeleteMapping("/user/{id}")
    @Operation(summary = "删除用户通知")
    public ResponseEntity<Void> deleteUserNotification(@PathVariable Long id) {
        return ResponseEntity.ok().build();
    }

    // ==================== 管理端通知接口 ====================
    @GetMapping("/admin")
    @Operation(summary = "获取管理端通知列表")
    public ResponseEntity<Page<Map<String, Object>>> getAdminNotifications(
            @RequestParam(defaultValue = "0") int page,
            @RequestParam(defaultValue = "10") int size,
            @RequestParam(required = false) String type,
            @RequestParam(required = false) String status) {
        
        Pageable pageable = PageRequest.of(page, size, Sort.by("createdAt").descending());
        Page<Map<String, Object>> emptyPage = Page.empty(pageable);
        return ResponseEntity.ok(emptyPage);
    }

    @PostMapping("/admin")
    @Operation(summary = "创建系统通知")
    public ResponseEntity<Map<String, Object>> createNotification(
            @Valid @RequestBody Map<String, Object> notificationData) {
        
        Map<String, Object> response = new HashMap<>();
        response.put("success", true);
        response.put("message", "通知创建成功");
        response.put("id", 1L);
        return ResponseEntity.ok(response);
    }

    @PutMapping("/admin/{id}")
    @Operation(summary = "更新系统通知")
    public ResponseEntity<Map<String, Object>> updateNotification(
            @PathVariable Long id,
            @Valid @RequestBody Map<String, Object> notificationData) {
        
        Map<String, Object> response = new HashMap<>();
        response.put("success", true);
        response.put("message", "通知更新成功");
        return ResponseEntity.ok(response);
    }

    @DeleteMapping("/admin/{id}")
    @Operation(summary = "删除系统通知")
    public ResponseEntity<Void> deleteNotification(@PathVariable Long id) {
        return ResponseEntity.ok().build();
    }

    @PostMapping("/admin/{id}/send")
    @Operation(summary = "发送通知")
    public ResponseEntity<Map<String, Object>> sendNotification(@PathVariable Long id) {
        Map<String, Object> response = new HashMap<>();
        response.put("success", true);
        response.put("message", "通知发送成功");
        response.put("sentCount", 150);
        return ResponseEntity.ok(response);
    }

    @PostMapping("/admin/broadcast")
    @Operation(summary = "广播通知")
    public ResponseEntity<Map<String, Object>> broadcastNotification(
            @RequestBody Map<String, Object> broadcastData) {
        
        Map<String, Object> response = new HashMap<>();
        response.put("success", true);
        response.put("message", "广播通知发送成功");
        response.put("sentCount", 1250);
        return ResponseEntity.ok(response);
    }

    // ==================== 通知模板管理 ====================
    @GetMapping("/templates")
    @Operation(summary = "获取通知模板列表")
    public ResponseEntity<List<Map<String, Object>>> getNotificationTemplates() {
        List<Map<String, Object>> templates = List.of(
            Map.of(
                "id", 1L,
                "name", "订单状态更新",
                "type", "ORDER",
                "title", "订单状态更新通知",
                "content", "您的订单 #{orderNumber} 状态已更新为 {status}",
                "isActive", true
            ),
            Map.of(
                "id", 2L,
                "name", "优惠券过期提醒",
                "type", "PROMOTION",
                "title", "优惠券即将过期",
                "content", "您有 {count} 张优惠券将在 {days} 天后过期",
                "isActive", true
            )
        );
        return ResponseEntity.ok(templates);
    }

    @PostMapping("/templates")
    @Operation(summary = "创建通知模板")
    public ResponseEntity<Map<String, Object>> createNotificationTemplate(
            @RequestBody Map<String, Object> templateData) {
        
        Map<String, Object> response = new HashMap<>();
        response.put("success", true);
        response.put("message", "通知模板创建成功");
        return ResponseEntity.ok(response);
    }

    @PutMapping("/templates/{id}")
    @Operation(summary = "更新通知模板")
    public ResponseEntity<Map<String, Object>> updateNotificationTemplate(
            @PathVariable Long id,
            @RequestBody Map<String, Object> templateData) {
        
        Map<String, Object> response = new HashMap<>();
        response.put("success", true);
        response.put("message", "通知模板更新成功");
        return ResponseEntity.ok(response);
    }

    @DeleteMapping("/templates/{id}")
    @Operation(summary = "删除通知模板")
    public ResponseEntity<Void> deleteNotificationTemplate(@PathVariable Long id) {
        return ResponseEntity.ok().build();
    }

    // ==================== 通知统计 ====================
    @GetMapping("/statistics")
    @Operation(summary = "获取通知统计")
    public ResponseEntity<Map<String, Object>> getNotificationStatistics() {
        Map<String, Object> statistics = new HashMap<>();
        
        statistics.put("totalNotifications", 5420L);
        statistics.put("sentNotifications", 5200L);
        statistics.put("readNotifications", 4800L);
        statistics.put("unreadNotifications", 400L);
        statistics.put("failedNotifications", 220L);
        
        statistics.put("todayNotifications", 150L);
        statistics.put("todaySent", 145L);
        statistics.put("todayRead", 120L);
        
        statistics.put("readRate", 92.3);
        statistics.put("deliveryRate", 95.9);
        
        return ResponseEntity.ok(statistics);
    }

    // ==================== 推送设置 ====================
    @GetMapping("/settings")
    @Operation(summary = "获取推送设置")
    public ResponseEntity<Map<String, Object>> getPushSettings() {
        Map<String, Object> settings = new HashMap<>();
        settings.put("emailEnabled", true);
        settings.put("smsEnabled", false);
        settings.put("pushEnabled", true);
        settings.put("inAppEnabled", true);
        settings.put("quietHours", Map.of("start", "22:00", "end", "08:00"));
        return ResponseEntity.ok(settings);
    }

    @PutMapping("/settings")
    @Operation(summary = "更新推送设置")
    public ResponseEntity<Map<String, Object>> updatePushSettings(
            @RequestBody Map<String, Object> settings) {
        
        Map<String, Object> response = new HashMap<>();
        response.put("success", true);
        response.put("message", "推送设置更新成功");
        return ResponseEntity.ok(response);
    }
}
